[Effects of lactational dioxin exposure to development of alveolar bone in SD rat offspring].
OBJECTIVE
To study the influence of lactational dioxin exposure (2, 3, 7, 8-tetrachlorodibenzo-p-dixon, TCDD) on development of alveolar bone in SD rat offspring.


METHODS
The rats of TCDD exposure group and control group were sacrificed and the alveolar bone with molars of PD60 rats in the two groups were embedded in resin. The sections were observed by fluorescent microscope. The alveolar bone formation was evaluated by histological examination, tetracycline fluorescence marker and quantitative histomorphometry. The indices of quantitative histomorphometry were compared.


RESULTS
The trabecular structure of alveolar bone was looser in TCDD exposure group than in the control group. The tetracycline fluorescence markers were more disorganized in TCDD group. The indices of quantitative histomorphometry of alveolar bone between two groups showed significantly different.


CONCLUSIONS
Lactational 2,3,7,8-TCDD exposure decreased the quality and quantity of alveolar bone in SD rat offspring. It is suggested that dioxins exposure may interrupt the spatial configuration.
Geng
Hua-ou
HO
Department of Periodontology, Guangdong Provincial Stomatological Hospital, Guangzhou 510280, China.
Zhang
Jin-cai
JC
Hu
Bin
B
Wang
Jing-bin
JB
D000818:Animals; D005260:Female; D007774:Lactation; D018811:Maternal Exposure; D000072317:Polychlorinated Dibenzodioxins / Q000633:toxicity*; D011247:Pregnancy; D051381:Rats; D017207:Rats, Sprague-Dawley; D020390:Tooth Socket / Q000187:drug effects* / Q000254:growth & development* / Q000473:pathology
D000072317:Polychlorinated Dibenzodioxins